PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
PDF Password Remover Tool - PDF Password Remover Tool. Free PDF password remover tool by PDF Technologies. Remove passwords from PDF documents.
QPDF - QPDF is a command-line program that does structural, content-preserving transformations on PDF...
Recover PDF Password - Recover PDF Password for Mac recovers forgotten passwords to PDF and unlocks PDF documents.
iSafePDF - iSafePDF is a free open source PDF protection software.
Free Any Data Recovery - 100% Completely Free Data Recovery Software